Determination of double-K fracture parameters using semi-circular bend test specimens

被引：48
作者：
Xu, Shilang [1 ]
Malik, Muhammad Akbar [1 ]
Li, Qinghua [1 ]
Wu, Yao [1 ]
机构：
[1] Zhejiang Univ, Inst Adv Engn Struct & Mat, Hangzhou 310058, Zhejiang, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2016年 / 152卷
基金：
中国国家自然科学基金;
关键词：
Semi-circular bend specimen; Double-K parameters; Fracture parameters; QUASI-BRITTLE FRACTURE; PEAK-LOAD METHOD; CRACK-PROPAGATION; CONCRETE FRACTURE; TENSION SPECIMENS; TOUGHNESS; CRITERION; MODEL; ROCK; PREDICTION;
D O I：
10.1016/j.engfracmech.2015.12.006
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The present research was conducted to evaluate the double-K fracture parameters using semi-circular bend test. Fracture tests were carried out on semi-circular bend specimens with three different diameters with a range from 200 mm to 500 mm and four different concrete strengths. The results indicated that double-K fracture parameters K-Ic(ini) and K-Ic(un) values for semi-circular bend specimens were size and strength dependent. All the fracture parameters such as critical effective crack length, critical crack mouth opening displacement and unstable fracture toughness increased as the specimen size increased; while, initial fracture toughness decreased with the increase of specimen size. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：58 / 71
页数：14
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